Chapter 7: Quality of Service (QoS)
Configuring Scheduling
phn-3965_006v002
Page 7-37
Configuring Scheduling
This section includes:
•
•
•
•
Assigning a Priority Profile to an Interface
•
Assigning a WFQ Profile to an Interface
Scheduling Overview
Scheduling determines the priority among the queues. PTP 820G and PTP 820F provides a unique hierarchical
scheduling model that includes four priorities, with Weighted Fair Queuing (WFQ) within each priority, and shaping
per port and per queue.
The scheduler scans the queues and determines which queue is ready to transmit. If more than one queue is ready
to transmit, the scheduler determines which queue transmits first based on:
•
Queue Priority
–
A queue with higher priority is served before lower-priority queues.
•
Weighted Fair Queuing (WFQ)
–
If two or more queues have the same priority and are ready to transmit, the
scheduler transmits frames from the queues based on a WFQ algorithm that determines the ratio of frames
per queue based on a predefined weight assigned to each queue.
Configuring Priority Profiles
Scheduling priority profiles determine the queue priority. Each profile contains eight CoS-based priorities,
corresponding to eight queues in an interface to which the profile is assigned. You can configure up to eight
priority profiles. A ninth profile, Profile ID 9, is pre-configured. You can configure Green priorities from 4 (highest)
to 1 (lowest). An additional four Yellow priority profiles are defined automatically.
This section includes:
•
Adding a Scheduler Priority Profile
•
Editing a Service Scheduler Priority Profile
•
Deleting a Scheduler Priority Profile
Adding a Scheduler Priority Profile
To add a scheduler priority profile:
Summary of Contents for PTP 820 Series
Page 1: ...User Guide ...
Page 49: ...Chapter 1 Introduction Configuration Tips phn 3965_006v002 Page 1 3 ...
Page 162: ...Chapter 3 Configuration Guide System Configurations phn 3965_006v002 Page 3 4 ...
Page 294: ...Chapter 4 Unit Management Upgrading the Software phn 3965_006v002 Page 4 19 5 Select FTP ...
Page 713: ...Chapter 14 Getting Started CLI Configuring the Activation Key CLI phn 3965_006v002 Page 14 18 ...
Page 731: ...Chapter 14 Getting Started CLI Operating in FIPS Mode CLI phn 3965_006v002 Page 14 36 ...